Characterization and interpretation of the morphology of a Mg2Sn precipitate with irrational facets in a Mg-Sn-Mn alloy

被引：23

作者：

Shi, Z. -Z. ^{[2
]}

Zhang, W. -Z. ^{[1
]}

Gu, X. -F. ^{[1
]}

机构：

[1] Tsinghua Univ, Dept Mat Sci & Engn, Adv Mat Lab, Beijing 100084, Peoples R China

[2] Cent Iron & Steel Res Inst, Inst Struct Mat, Ultra High Strength Res Dept, Beijing 100081, Peoples R China

来源：

PHILOSOPHICAL MAGAZINE | 2012年 / 92卷 / 09期

关键词：

magnesium alloy; precipitation; interface; simulation; AGE-HARDENING RESPONSE; SI ALLOY; CRYSTALLOGRAPHY; ZN; PHASES;

D O I：

10.1080/14786435.2011.640294

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The crystallographic morphology of beta-Mg2Sn precipitates at (near) Burgers orientation relationship (OR) with respect to the alpha-Mg matrix in a Mg-Sn-Mn alloy was investigated by transmission electron microscopy (TEM). Two irrational facets of the precipitates were found to be F1 similar to//(-1 1 0.74)(beta) and F2 similar to//(-1 1 -3.1)(beta). The facets are interpreted according to interfacial structures. The presence of a singular dislocation structure in F1 requires a small rotation of 0.21 degrees from the Burgers OR. The calculated morphology is consistent with the observations.

引用

页码：1071 / 1082

页数：12

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